Hi and welcome!! We're so excited to have Nathan's buddy coming in, thank you for bringing him to life! I'm Jamie and I have four characters here, so here's some first thoughts/ideas that we could work with once Jackson joins us!
guard_duty: Luc here is probably the most likely to have connections/future friendship with Jackson! Luc is the current Head of Security at the LBJ, of which Nathan is his second-in-command, so the two of them became tight pretty much as soon as Nathan walked into the shelter so Luc would welcome Nathan's old buddy with open arms! He's a charmer (he can't help it, it just sort of happens), which can either be flattering or annoying depending on how you take it, so whatever way Jackson would take Luc's natural inclination to flirt, it would be fun to play out!
hardestofhearts: Lita is my UMCB doctor but her second home was always the LBJ. Her best friend is Savannah Posey, sister of Nathan, so if they are all hanging out, chances are, Lita will meet him soon! She's pretty snooty, and just downright pretty, let's be real here. Even though she's a snob who buries all her feelings deep down she somehow still has friends so I'd be interested to see how she and Jackson got along!
zeroes_and_ones: Max is my Hellhound techie! He's super friendly, in a naive, genuine, way and honestly gets along with everyone. He's going to reside in the Greenbelt district and since the MC is tight with the LBJ fam, there's a good chance these two will run across one another!
five_o: Jane is my Capitol-based APD sergeant! She's a tough, no nonsense, loyal, law abiding cop that HATES criminals, especially the Hellhounds. The LBJ is tight with the MC so anyone at the LBJ is basically damaged goods by association in her book. Underneath her tough exterior she really does have soft spots but unfortunately Jackson is unlikely to ever see them and that's okay! She'll help him out by keeping Austin safe and making sure all its citizens follow the law of the land.
I can't wait to see Jackson arrive in Austin to shake things up! Don't be afraid to hit up any of my dropboxes for any/all questions about my peeps!